Socket



May 29, 1928. 4 1,671,760

E. A. BOHLMAN ET AL SOCKET Filed Jan. 11, 1926 Patented May 29, 1928.

UNITED STATES :P'ATENT OFFICE.

ERNEST A. BOHLMAN AND JOHN D. SHANNON, QFCHICAGO. ILLINOIS, AssIoNons TOKELLOGG swrrcneoaan AND SUPPLY COMPANY, or CHICAGO, ILLINOIS, 1 con-PORA'IION OF ILLINOIS.

SOCKET.

Application filed January 11, 1926. Serial No. 80,416.

Our invention relates to sockets and has to do more particularly withsockets such as are used in radio work for holding a standard four-prongbase vacuum tube. The vacuum tube, in addition to having four the sideof the base which is adapted to be inserted into a bayonet slot inthesocket to hold the tube against displacement and at the same time holdthe prongs firmly in ened in the socket; Many of the. socketsrnow in useare constructed of some. suitable moulded non-conducting compound and ithas been found that care must be exercised when inserting the tube intoor removing it from the socket that no unduepressure or pullis appliedto the tube as there is danger that the wall of the socket around thebayonet slot will be cracked or broken and thus render the socketuseless. t

The main object of our invention is the provision of a moulded socketwhich will overcome this objectionable feature and provide an improvedand more durable tube socket structure.

One of the features of our invention is the provision of a re-enforcingwall formed integrally with the wallcontaining the bayonet slot so thatthe bayonet slot will not extend entirely through the wall of thesocket.

Another feature resides in the construction whereby the socket isprovided adjacent to the edge with the depression forming the bayonetslot, but below or beyond the slot the inner cylindrical surface of thesocket is uninterrupted.

For a more complete understanding of our invention reference may be hadto the accompanying drawing in which:

Fig. 1 is an elevation of the tube socket of our invention.

Fig. 2 is a plan view of Fig. 1.

Fig. 3 is a sectional view along the line 3-3 of Fig. 2.

Fig. 4 is a sectional View along the line 44 of Fig. 2.

Fig. 5 is a sectional View along the line 5-5 of Fig. 1.

Referring now to the drawings in which like reference characters in theseveral views denote like parts. Our improved tube socket comprises asuitable base 2, having the upwardly extending cylindrical socket wall10 openings through w some suitable insulating compound which .maybepmoulded. prongs has a pin extending radially from Thebase 2, is alsoprovided witlrthe integrally formed In s 3, having suitable iich extendscrews or bolts 5, by means of which the spring contact terminals 6 aresecured to the base, nuts gagement with the terminal springs provid- 7and lock washers 8 beingpositioned. onthe the screw 5,01- iftheterminals 12 arenot used, nuts may be used to secure conductorsdirectly to the screws 5.

Integral with. the base 2, are the lugs or enlargements 4, mgs 4,adapted to receive screws or other provided. with the opensuitable meansforfastening the socket to a base board,

order to increase the thickness of. the socket wall at the point wherethe bayonet slot 14 .is provided, so that the slot but not through,reinforcing will extend into, the wall of the socket. The ortion13isprovided only in the region 0 slot 14 and tapers in thickness from thetop, or free edge of the socket, downwardly to the base inversely as thesocket wall tapers from the base upwardly to the free edge, thereinforced portion being of substantially uniform thickness throughout.

Referring now to Figs. 4 and 5, it will be seen that the bayonet slot 14extends into the socket member to a depth substantially equal to thethickness of the wall of the socket 10, but the reinforcing portion 13pro? vides a portion 15 which overlies and bridges the slot 14; thusgreatly reducing the danger of the socket becoming broken in thevicinity of the slot. Referring further to Fig. 4, it will be noted.thatthe inner surface of the socket 10, below the slot 14, is uniformlycylindrical.

The structure above described, in addition to providing a very stron anddurable socket, due to the reinforcer. portion overlying the slot,avoids the use of an insert at the slot, and thus reduces the cost ofmoulding the sockets.

The/socket wall .10 is provided with are nforc ng portion 13 at one sidethereof, in

While we have illustrated and described a particular embodiment of ourinvention, it is to be understood that we do not desire to be limited tothe exact structure as shown and described, but intend to cover all suchchanges and modifications as come within the spirit and scope of theappended claims,

Having described our invention what we claim as new and desire to secureby Letters Patent is:

1. In a moulded tube socket of the character described, a cylindricalmember for receiving a tube base, said member being provided adjacent tothe edge thereof with a bayonet slot adapted to receive a pin laterallyprojecting from the said base, the inner surface of the said cylindricalmember below or beyond said slot being formed as an uninterruptedcylindrical surface, and a reenforcing portion formed integrally withthe said cylindrical member and adapted to strengthen the said member inthe region of said slot, said reenforcing portion being heaviest at thetop of saidcylindrical member and extending in a tapering manner thefull length thereof thereby reenforcing said cylindrical member invarying amounts throughout its length.

2. In a moulded tube socket of the character described, a cylindricalmember for receiving a tube base, said member being provided adjacent tothe edge thereof with a bayonet slot, the inner surface of the saidcylindrical member below or beyond said slot being formed as anuninterrupted cylindrical surface, and a reenforcing portion formedintegrally with said cylindrical member said portion being heaviest atthe upper end and extending in a tapering manner longitudinally the ulllength thereof in the region of and overlying said slot, therebyreenforcing said cylindrical member in varying amounts throughout itslength.

3. In a moulded tube socket of the character described, a cylindricalwall for receiving a tube base, a reenforcing portion at one side ofsaid wall and formed integrally therewith, said wall having a bayonetslot or groove formed in the inner surface thereof, said inner surfacebelow and beyond said slot being formed as an uninterrupted cylindricalsurface, said reenforcing member overlying and bridging the said slot,and extending in a tapering manner from its thickest portion on theupper edge of the cylindrical member the entire length of the cylinderthereby reenforcing the cylindrical member in varying amounts throughoutits length.

4. In a moulded tube socket of the character described, acylindric'al'wall for receiving a tubebase, av rcenforcing portion atone side of said Wall and formed integrally therewith, said wall havinga bayonet slot or groove formed in the inner surface thereof adjacent tothe edge of said wall, said reenforcing member overlying and bridgingthe said slot and extending in a tapering manner from its thickestportion on the upper edge of the cylindrical member the entire length ofthe cylindrical, member thereby reenforcing said member in varyingamounts throughout its length, the inner surface of the said cylindricalwall below or beyond said slot being formedas an uninterruptedcylindrical surface.

In testimony whereof we have signed this specification.

ERNEST A. BOHLMAN. JOHN D. SHANNON.

